Time-controlled corrective apparatus for dual secondary systems



P 1936. E. B. JACKSON 2,055,080

TIME CONTROLLED CORRECTIVE APPARATUS FOR DUAL SECONDARY SYSTEMS Original Filed Sept. 24, 1932 Patented Sept. 22, 1936 TIME-CONTROLLED CORRECTIVE APPARA- TUS FOR. DUAL SECONDARY SYSTEMS Edward B. Jackson, Downers Grove, Ill., assignor, by mesne assignments, to Stromberg Electric Company, Chicago, 111., a corporation of Delaware Application September 24, 1932, Serial No. 634,684

Renewed March 7, 1934 18 Claims.

My invention relates to time-controlled corrective apparatus for a dual secondary system.

One of the objects of my invention is to provide a'system which will enable the use both of corrective secondary apparatus and noncorrective secondary apparatus on the same circuit.

One of the advantages of this system is in the case where a customer desires to start gradually switching over to a corrective system, still utilizing and operating certain of his noncorrective equipment on the same circuit. Under these conditions the customer could install a corrective master clock and control equipment with as many pieces of corrective apparatus as he desired and could operate therewith his noncorrective equipment until such time as he desired to complete the installation of corrective apparatus. Obviously, in doing it in this way, he is not required to make the entire investment at one time.

Another advantage of this system develops under the. following conditions: A user may have an installation of recorders of a different make from the type which he is considering adding and which may be of the noncorrective type, and he may desire to purchase from a difierent manufacturer secondary clocks and time stamps of the corrective type operating in connection therewith his old noncorrective recorders. By the use of my improved system he is not required to sacrifice his investment in recorders. As the old noncorrective type recorders wear out they can be discarded one at a time and be replaced with corrective equipment.

Another advantage develops in the following situation: A customer may wish to change his noncorrective system to a corrective system but owing to the size of the system it might require several weeks time to make the change, during which time the entire system would be out of service without the use of my invention. With the use of my invention, however, the master clock and control equipment could be installed and it would then be possible to operate the corrective apparatus as it is installed and at the same time keep the noncorrective equipment in service.

Another advantage is the saving of current in a two-wire system, due to the fact that the corrective system blocks the impulses at times permitting no current to flow.

My corrective system is adaptable for circuits in which the normal or slow impulses are in one direction and the corrective rapid impulses are in the opposite direction. It is this distinctive feature that makes it possible to operate noncorrective and corrective apparatus in the same system and on the same circuit. In previous twowire corrective systems, the normal and fast impulses have been uni-directional which would make it impossible to use corrective and noncorrective apparatus on such circuits. However, by making the normal impulses in one direction and the fast corrective impulses in the opposite direction, as pointed out above, I am enabled to make provisions which will enable both corrective secondary apparatus and noncorrective secondary apparatus to be used on the same circuit.

In the drawings, in which my invention is illustrated:

Figure l is a diagrammatic view of the circuit and apparatus; and

Fig. 2 is a perspective View showing the camcontrol for the circuits of the secondary apparatus.

Referring to the apparatus in detail, each noncorrective secondary apparatus comprises an actuating electromagnetic device I for controlling an armature which may operate a pawl to drive a ratchet wheel of the secondary apparatus and a one-way valve 2 which enables the normal impulses to pass and be effective on the electromagnetic device I but which rejects the rapid reverse corrective impulses, rendering them ineffective on the electromagnetic device I.

Each secondary corrective apparatus comprises, in addition to the electromagnetic device I for actuating the armature 2 on the rock lever 3 which carries the pawl 4 driving the ratchet wheel 5, a pair of cam wheels 6 and l on the shaft of the ratchet wheel for controlling a pair of switches 8 and 9, respectively, in bridge of the one-way electric valve devices l0 and II, respectively, in the circuit for the electromagnetic device I. The one-way valve II is connected and designed to enable the normal impulses to pass and to reject the rapid reverse corrective impulses while the one-way valve 1B is connected so as to reject the normal direct impulses and enable the rapid reverse corrective impulses to pass.

The cams 6 and l are so designed and timed that the contacts 8 are opened one minute ahead of the contacts 9 and are closed at the time the contacts 9 are opened.

The master and relay apparatus shown comprises the usual minute contact device [2 which closes the circuit once each minute by master clock time to energize the relay magnet 13 and cause a normal direct impulse to go out over the line to the secondary apparatus to advance all of the secondary apparatus, both corrective and noncorrective, a rapid corrective impulse contact device It which is periodically connected with the relay apparatus l3 for sending out a series of rapid impulses in a reverse direction (which will be ineffective on the noncorrective secondary apparatus), a cam-controlled contact device I for efiecting the periodic action of the rapid switch I4 to which reference was made, and v a cam-controlled contact device 16 for periodically reversing the power connections during the period in which the rapid reverse current impulses are being sent out.

The pole changing apparatus for reversingthe battery connections may be of any suitable type and as shown comprises an electromagnet 1'! controlled by the contact device [6 and controlling the two pivoted conductors 18 which are oscillatable between the terminals 19, 20, 2|, and 22 for reversing the power connections.

Any suitable master-controlled timing may be provided for the control of the current reversal period and of the cutting in of the rapid impulsesending apparatus. For instance, the cam controlling the contact device l5 may be so designed as to connect in the rapid contact device M from 59 minutes and seconds until 59 minutes and 40 seconds, during which time, assuming that the contacts are two second contacts, fifteen reverse current corrective impulses will be sent out for advancing any slow secondary apparatus of the'corrective type. The master-controlled cam which controls the pole changing device will, of course, be designed so as to reverse the current just before the rapid contact device I4 is connected in (say about 59 minutes, 5 seconds after the hour) and to again reverse it tobring the impulses back to normal just after the last rapid impulse has been'sent out (say about 59 minutes, 45 seconds after the hour). Thus all the rapid impulses sent out will be inefiective on the noncorrective secondary apparatus D.

Referring now again to the secondary apparatuses, the secondary corrective apparatus A shows the'position of the contact devices 8 and 9 from the beginning of the hour until just before the fifty-eighth impulse, that is, up until the time when the minute hand of the secondary clock is about to move from the fifty-seventh minute to the fifty-eighth minute.

Corrective secondary apparatus 3 shows the position of the contact devices 8 and 9 from just after the instant the fifty-eighth impulse has become effective until just before the first one of the rapid impulses has become efiective, that is to say, during the period when the time shown by secondary clock apparatus is 58 minutes after the hour;

The corrective secondary apparatus C shows the position of the contact devices 8 and 9 from just after the instant the first rapid reverse current impulse has become effective until just before the sixtieth impulse has become effective, that is to say, during the period when the time shown by the secondary clock apparatus is 59 minutes after'the hour. When the sixtieth impulse becomes effective, the contact devices 8 and 9 will be brought back again to the position shown in the secondary following action may take place:

We will assume first the action of the second- 7 ary apparatus which is exactly in time with the master apparatus. Under this condition, when the fifty-eighth impulse becomes efiective, the minute hand of the secondary apparatus will move from the fifty-seventh minute to the fiftyeighth minute and the contact device 8 will be moved from the closed position shown in apparatus A to the open position shown in apparatus B, the contact device 9 still remaining closed. Contact device 8 being open, thus enables the one-way valve device It to block normal direction impulses. The fifty-ninth normal impulse, therefore, is unable to advance the secondary apparatus. However, five seconds after the fifty-ninth normal impulse is sent out from the master clock, the power connections are reversed and at 59 minutes and 10 seconds after the hour the rapid reverse impulses begin coming over the line. The first one of these impulses will be effective on the secondary apparatus when in the condition shown at B and this will advance the secondary clock to move the minute hand from 58 minutes to 59 minutes. This closes the contact device 3 and opens contact device 9, leaving the contact devices in the position shown in apparatus C. The opening of the contact device 9 enables the one-way valve H to block the rest of the rapid reverse impulses so that the clock remains with the minute hand at the fiftyninth minute until the master clock again reverses the current and a normal direction impulse is sent out. This normal direction impulse occurs at the end of the hour by master clock time and steps up the secondary clock from the fifty-ninth to the sixtieth minute, as the oneway' valve ll enables the normal direction im pulse to flow and the contact device 8 affords a circuit around the one-way valve it. This brings the parts back to the position shown in apparatus A ready to start the hour a ain.

If one of the secondary apparatuses is slow, it will remain slow until'the sending out of the rapid reverse impulses, which will step up the slow secondary apparatus rapidly until the minute hand of the secondary apparatus is at the fifty-ninth minute when the contact devices 8 and 9 will assume the position shown in apparatus C and the rest of the rapid impulses will be blocked by the one-way valve so that no current will flow and the clock will not be advanced to the sixtieth minute until a normal direction impulse is again sent out. o o

In the event that the secondary apparatus is fast, its contact devices 8 and 9 will assume the position shown in apparatus B, when its minute hand arrives at the fifty-eighth minute so that further normal direction impulses will be ineffective to advance this fast apparatus. This apparatus will therefore be held at the fifty-eighth minute until the first one of the reverse rapid impulses is sent out, whereupon the contact devices 9 and 9 will assume the position shown inapparatus C, the secondary minute hand standing at the fifty-ninth minute. Succeeding rapid impulses will, of course, be blocked by the one-way valve and the contact devices will remain in this position and the minute hand will stand at the fifty-ninth minute until the cur rent is again brought back to normal and the normal direct impulse is sent out from the master which will advance the secondary minute hand to the sixtieth minute and bring the contact devices 8 and 9 back to the position shown in apparatus A. o

Of course, during all of this action, the noncorrective apparatus indicated at D is controlled one-way valve H renders the reverse rapid im-' pulses ineffective.

Further modifications will be apparent to those skilled in the art and it is desired, therefore, that the invention be limited only by the prior art and the scope of the appended claims.

Having thus described my invention, what I claim and desire to secure by Letters Patent is:

l. A corrective time-controlled system comprising master, secondary and corrective apparatus, said secondary apparatus comprising electromagnetic impulse apparatus provided with corrective means and other electromagnetic impulse apparatus not provided with corrective means, both said secondary apparatuses being on the same circuit, said master apparatus comprising means for sending out normal impulses for advancing both said secondary apparatuses, said corrective apparatus comprising means for periodically sending out a number of rapid impulses in a direction reverse to that of the normal impulses for periodically advancing slow secondary corrective apparatus, and means for preventing said rapid reverse impulses from advancing the noncorrective secondary apparatus.

2. A corrective time-controlled system comprising master, secondary and corrective apparatus, said secondary apparatus comprising electromagnetic impulse apparatus provided with corrective means and other electromagnetic'impulse apparatus not provided with corrective means, both said secondary apparatuses being on the same circuit, said master apparatus comprising means for sending out normal impulses for advancing both said secondary apparatuses, said corrective apparatus comprising means for periodically sending out a number of rapid impulses in a direction reverse to that of the normal impulses for periodically advancing slow secondary corrective apparatus, and means for preventing said rapid reverse impulses from advancing the noncorrective secondary apparatus comprising oneway valve means in the circuit for the non-corrective secondary apparatus for rejecting the reverse current impulses.

3. A corrective time-controlled system comprising master, secondary and corrective apparatus, said secondary apparatus comprising electromagnetic impulse apparatus provided with corrective means and other electromagnetic impulse apparatus not provided with corrective means, both said secondary apparatuses being on the same circuit, said master apparatus comprising means for sending out normal impulses for advancing both said secondary apparatuses, said corrective apparatus comprising means for periodically sending out a number of rapid impulses in a direction reverse to that of the normal impulses for periodically advancing slow secondary corrective apparatus, the secondary corrective apparatus comprising means controlled by the chronological condition of the secondary corrective apparatus for periodically blocking normal impulses to prevent them from advancing said secondary corrective apparatus and for periodically blocking reverse rapid impulses to prevent them from advancing said secondary corrective apparatus, and means for preventing said rapid reverse impulses from advancing the noncorrective secondary apparatus.

4. A corrective time-controlled system comprising master, secondary and corrective apparatus, said secondary apparatus comprising electromagnetic impulse apparatus provided with corrective means and other electromagnetic impulse apparatus not provided with corrective means, both said secondary apparatuses being on the same circuit, said master apparatus comprising means for sending out normal impulses for advancing both said secondary apparatuses, said corrective apparatus comprising means for periodically sending out a number of rapid impulses in a direction reverse to that of the normal impulses for periodically advancing slow secondary corrective apparatus, the secondary corrective apparatus comprising means controlled by the chronological condition of the secondary corrective apparatus for periodically blocking normal impulses to prevent them from advancing said secondary corrective apparatus and for periodically blocking reverse rapid impulses to prevent them from advancing said secondary corrective apparatus including a one-way electric valve for rejecting the normal impulses, a switch in bridge of said one-way valve controlled by the chronological condition of the corrective secondary apparatus, a one-way electric valve for rejecting the reverse impulses, and a switch in bridge of said electric valve also controlled by the chronological condition of the secondary corrective apparatus, and means for preventing said rapid reverse impulses from advancing the noncorrective secondary apparatus.

5. A corrective time-controlled system comprising master, secondary and corrective apparatus, said secondary apparatus comprising electromagnetic impulse apparatus provided with corrective means and other electromagnetic impulse apparatus not provided with corrective means, both said secondary apparatuses being on the same circuit, said master apparatus comprising means for sending out normal impulses for advancing both said secondary apparatuses, said corrective apparatus comprising means for periodically sending out a number of rapid impulses in a direction reverse to that of the normal impulses for periodically advancing slow secondary corrective apparatus, the secondary corrective apparatus comprising means controlled by the chronological condition of the secondary corrective apparatus for periodically blocking normal impulses to prevent them from advancing said secondary corrective apparatus and for periodically blocking reverse rapid impulses to prevent them from advancing said secondary corrective apparatus, and means for preventing said rapid reverse impulses from advancing the noncorrective secondary apparatus comprising oneway valve means in the circuit for the noncorrective secondary apparatus for rejecting the reverse current impulses.

6. A corrective time-controlled system comprising master, secondary and corrective apparatus, said secondary apparatus comprising electromagnetic impulse apparatus provided with corrective means and other electromagnetic impulse apparatus not provided with corrective means, both said secondary apparatuses being on the same circuit, said master apparatus comprising means for sending out normal impulses for advancing both said secondary apparatuses, said corrective apparatus comprising means for periodically sending out a number of rapid impulses in a direction reverse to that of the normal impulses for periodically advancing slow secondary corrective apparatus, the secondary corrective apparatus comprising means controlled by the chronological condition of the secondary corrective apparatus for periodically blocking normal impulses to prevent them from advancing said secondary corrective apparatus and for periodically blocking reverse rapid impulses to prevent them from advancing said secondary corrective apparatus including a one-way electric valve for rejecting the normal impulses, a switch in bridge of said one-way valve controlled by the chronological condition of the corrective secondary apparatus, a one-way electric valve for rejecting the reverse impulses, and a switch in bridge of said electric valve also controlled by the chronological condition of the secondary corrective apparatus, and means for preventing said rapid reverse impulses from advancing the noncorrective secondary apparatus comprising one-way valve means in the circuit for the noncorrective secondary apparatus for rejecting the reverse current impulses.

7. In a corrective time-controlled system, master apparatus, corrective secondary apparatus and non-corrective secondary .apparatus connected to said master apparatus over the same circuit, means in said master apparatus for sending impulses of one characteristic over said circuit to advance both said secondary apparatuses,

means in said master apparatus for periodically sending a number of rapid impulses of a second characteristic over said circuit to advance slow secondary apparatus, and means for preventing impulses of said second characteristic from advancing said non-corrective secondary apparatus.

. 8. In a corrective time-controlled system, master apparatus, corrective secondary apparatus and non-corrective secondary apparatus connected to said master apparatus over the same circuit, means in said master apparatus for sending electrical impulses at one rate over said circuit to advance all of said secondary apparatuses in synchronism, means in said master apparatus for sending other electrical impulses of a second characteristic at a higher rate over said circuit to advance slow secondary apparatus, and discriminating means in said secondary apparatus for preventing said last-named impulses from advancing said non-corrective secondary apparatus.

9. In a corrective time-controlled system, master apparatus, corrective secondary apparatus and non-corrective secondary apparatus connected to said master apparatus over the same circuit, means in said master apparatus for sending two classes of impulses over said circuit, means in said secondary apparatuses responsive to impulses of one of said classes for advancing all of said secondary apparatuses, and discriminating means in said secondary apparatuses cooperating with said last means for enabling the advance of slow corrective secondary apparatus and for preventing the advance of non-corrective secondary apparatus responsive to impulses of the other of said classes.

10. In a corrective time-controlled system, master apparatus, two classes of secondary apparatus connected to said master apparatus over the same circuit, means in said master apparatus for transmitting two kinds of current over said circuit, and discriminating means in said secondary apparatus responsive to one kind of current for operating the secondary apparatus of both classes and responsive to the other kind of current for preventing the operation of the secondary apparatus of one of said classes and for enabling the operation of only certain of the secondary apparatus of the other of said classes depending upon the chronological condition thereof.

11. In a corrective time-controlled system secondary apparatus 'for controlling said electro- V magnetic means to respond to all or a part of said rapid corrective impulses dependent upon the chronological condition of said secondary apparatus.

12. In a corrective time-controlled system, master apparatus, secondary apparatus connected to said master apparatus by an electrical circuit, means in said master apparatus for transmitting normal operating impulses in one direction over said circuit to normally operate said secondary apparatus and for transmitting rapid corrective impulses in a reverse direction over said circuit to accelerate secondary apparatus which is lagging behind said master apparatus, a magnet in said secondary apparatus energized by said impulses to advance said apparatus, two electric valves oppositely connected in the circuit of said magnet, and means controlled by the chronological condition of said secondary apparatus for short-circui-ting one, the other, and both of said valves.

13. In a corrective time-controlled system master apparatus, secondary apparatus connected to said master apparatus by an electrical circuit, means in said master apparatus for transmitting slow operating impulses in one direction over said circuit and for periodically transmitting a series of rapid corrective impulses in the reverse direction over said circuit, a magnet in said secondary apparatus responsive to! impulses, an electric valve in the circuit of said magnet for blocking said slow impulses, a second electric valve in the circuit of said magnet for blocking said corrective impulses, and means controlled by fective to control the magnet in synchronizing said secondary apparatus with said master apparatus.

14. In a corrective time-controlled system, master apparatus, corrective and non-corrective secondary apparatuses connected to said master apparatus over the same circuit, means in said master apparatus for transmitting normal driving impulses over said circuit to advance all of said secondary apparatuses in synchronism, means in said master apparatus for transmitting aspecial series of impulses to advance slow corrective secondary apparatus, and means for preventing said last-named impulses from advancing said noncorrective secondary apparatus.

15. In a corrective time-controlled system, master apparatus and secondary apparatus connected by a control circuit, means in said master apparatus for transmitting normal driving impulses and rapid accelerating impulses to said secondary apparatus, means for rendering said secondary apparatus ineiiective to respond to repeated normal impulses when it is operated to a predeterminedchronological position by said normal impulses, and other means for rendering said secondary apparatus inefiective to respond to further rapid accelerating impulses when it is operated to a predetermined chronological position by said rapid accelerating impulses.

16. In a corrective time-controlled system in which secondary apparatus is advanced by normal driving impulses and, if slow, by rapid accelerating impulses transmitted by a master apparatus, a first position for said secondary apparatus, means efiective when said secondary apparatus reaches said first position and is fast for rendering it inefiective to respond to further normal impulses, a second position for said secondary apparatus, and means effective when said secondary apparatus is slow and is advanced to said second position by said rapid impulses for rendering it inefiective to respond to further rapid impulses.

1'7. In a secondary apparatus for use in a corrective time-controlled system, an operating magnet for advancing said apparatus, a circuit for said magnet, a one-way valve for rejecting current in one direction over said circuit, a second one-way valve for rejecting current in the other direction over said circuit, and means for rendering one, the other, and both of said valves ineffective dependent upon the chronological condition of said apparatus.

18. In a secondary apparatus for use in a corrective time-controlled system, an operating magnet for advancing said apparatus, tWo one-way electric valves oppositely connected in the circuit of said magnet, and means controlled by the chronological condition of said apparatus for shunting one, the other, and both of said valves.

EDWARD B. JACKSON. 

